Sec Form 4 Filing - Morice Christopher E @ Talen Energy Corp - 2025-02-28

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Morice Christopher E 2. Issuer Name and Ticker or Trading Symbol Talen Energy Corp [ TLN] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Commercial Officer (Last) (First) (Middle) 2929 ALLEN PKWY, SUITE 2200 3. Date of Earliest Transaction (MM/DD/YY) 02/28/2025 (Street) HOUSTON, TX77019 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares 2025 Restricted Stock Units ( 1 ) 02/28/2025 A 1,963 ( 2 ) ( 2 ) Common Stock 1,963 $ 0 1,963 D 2025 Performance-Based Restricted Stock Units ( 3 ) 02/28/2025 A 14,064 ( 4 ) ( 4 ) Common Stock 14,064 $ 0 14,064 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Morice Christopher E 2929 ALLEN PKWY SUITE 2200 HOUSTON, TX77019 Chief Commercial Officer Signatures /s/ John C. Wander, attorney-in-fact 03/04/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock"), of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan. ( 2 )Represents RSUs that, subject to the reporting person's continued service, will vest on February 28, 2027. ( 3 )Each Performance-Based Restricted Stock Unit ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan. ( 4 )Represents PSUs that, subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals, will vest on February 28, 2027. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%).

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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